linux-kernel - [PATCH v2 1/4] dt-bindings: Add cros-ec Type C port driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200207203752.209296-2-pmalani@chromium.org>
Date:   Fri,  7 Feb 2020 12:37:44 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     heikki.krogerus@...el.com, enric.balletbo@...labora.com,
        bleung@...omium.org, Prashant Malani <pmalani@...omium.org>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), Guenter Roeck <groeck@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Subject: [PATCH v2 1/4] dt-bindings: Add cros-ec Type C port driver

Some Chrome OS devices with Embedded Controllers (EC) can read and
modify Type C port state.

Add an entry in the DT Bindings documentation that lists out the logical
device and describes the relevant port information, to be used by the
corresponding driver.

Signed-off-by: Prashant Malani <pmalani@...omium.org>
---

Changes in v2:
- No changes. Patch first introduced in v2 of series.

 .../bindings/chrome/google,cros-ec-typec.yaml | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml

diff --git a/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
new file mode 100644
index 00000000000000..46ebcbe76db3c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/chrome/google,cros-ec-typec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google Chrome OS EC(Embedded Controller) Type C port driver.
+
+maintainers:
+  - Benson Leung <bleung@...omium.org>
+  - Prashant Malani <pmalani@...omium.org>
+
+description:
+  Chrome OS devices have an Embedded Controller(EC) which has access to
+  Type C port state. This node is intended to allow the host to read and
+  control the Type C ports. The node for this device should be under a
+  cros-ec node like google,cros-ec-spi.
+
+properties:
+  compatible:
+    const: google,cros-ec-typec
+
+  port:
+    description: A node that represents a physical Type C port on the
+      device.
+    type: object
+    properties:
+      port-number:
+        description: The number used by the Chrome OS EC to identify
+          this type C port.
+        $ref: /schemas/types.yaml#/definitions/uint32
+      power-role:
+        description: Determines the power role that the Type C port will
+          adopt.
+        oneOf:
+          - items:
+            - const: sink
+            - const: source
+            - const: dual
+      data-role:
+        description: Determines the data role that the Type C port will
+          adopt.
+        oneOf:
+          - items:
+            - const: host
+            - const: device
+            - const: dual
+      try-power-role:
+        description: Determines the preferred power role of the Type C port.
+        oneOf:
+          - items:
+            - const: sink
+            - const: source
+            - const: dual
+
+    required:
+      - port-number
+      - power-role
+      - data-role
+      - try-power-role
+
+required:
+  - compatible
+  - port
+
+examples:
+  - |+
+    typec {
+      compatible = "google,cros-ec-typec";
+
+      port@0 {
+        port-number = <0>;
+        power-role = "dual";
+        data-role = "dual";
+        try-power-role = "source";
+      };
+    };
-- 
2.25.0.341.g760bfbb309-goog